Time-fuse body and cap and method of making same.



I. L. POMEROY. TIME FUSE BODY AND CAP AND METHOD OF MAKING SAME. APPLICATION FILED 1AN.29,1911- 1,228,596. Patented June 5; 1917.

GJ-I hey Um 0W UNITED. STATES-PATENT OFFICE.

IRVING L. POMEROY, or'crrreAeo, ILLINOIS.

TIME FUSE BODY AND GAP AND METHOD OF: MAKING SAME.

Specification of Letterslatent.

Application filedJ'anuary 29, 1917-; Serial No. 145,116.

To all whom it may concern:

Be it known that I, IRVING L. POMEROY, a citizen of the United States, residing at Chlcago, in the county of Cook and State of quent reduction in the cost of manufacture as well as a saving in the cost of the metal used.

Further objects and advantages of my invention will be better understood by reference to the following specification when read in connection with the accompanying drawing, illustrating the preferred embodiments thereof, in which Figure 1 is a sectional view of my improved time fuse body and cap;

Fig. 2 is a detail in section of the cap illustrating the mode of securing the wind shield to, the cap, and

Fig. 8 is a detail in section of a cap illustrating a different mode of securing the wind shield to the cap.

Referring to the drawing, 5 indicates the central portion or core of the time fuse body which is formed internally to provide the usual front and rear plunger cavities 6 and 7 This core is formed complete by a die-casting operation, any suitable metal adapted to this operation being employed but preferably the metal known to the trade as aluminium alloy. In the embodiment of my invention illustrated in Fig. 1 the core is supplemented by an annular member 8 having a flange 9 to engage a corresponding flange 10 on the core 5. The annular-member 8 is also die-cast. Its function is to form the rear powder pocket and the core 5 fits tightly therein so as to form practically one integral piece.

A shell 11 is disposed in tightly fitting relation about the core 5. This shell is constructed of malleable sheet metal such for example as mild steel and is formed by drawing and die-rolling to shape before it is disposed about the core 5. A filler ring 12 of any cheap metal is disposed within the shell 11 at its greatest diameter, servingto support this part during the formation of the shell. Preferably the shell 11 is held in position by spinning a flange 13 into engagement with an undercut shoulder 14 on the member 8; The-shell 11 is-thread'ed at 15 by die-rolling, thussaving the slow operation as usually performed by a thread cutting die.

The core 5 is threaded at 16 to receive the cap 17 which' is die-cast complete ofsuitable metal and isprovidedwith a wind shield 18 stamped from malleable metal such for example as mild steel and secured to the cap in a manner to become practically integral" therewith. In Fig. 2 I have illustrated one mode of securing the wind shield 18 to the cap. The cap is provided with a groove 19 and the surplus metal 20 is worked into the groove by the rivet-spinning process thereby rigidly securing the shield in place. In Fig. 3 I have illustrated the wind shield 18 as secured to the cap 17 by fusing with electric current or other suitable heating means so that the shield becomes an integral part of the cap.

My invention as herein described obviates the necessity ofslow and costly machining in the manufacture of time fuse bodies and caps. The core 5, member 8 and cap 17 being die-cast and true to form, present a sufliciently finished appearance without further application of labor as does also the shell 11 when assembled therewith. It will be apparent that my, improvements make possible a Patented June 5,1917.

considerable saving not only in the reduction of the labor cost but in eliminating the necessity of employing the relatively expensive metals heretofore used.

Various changes may be made in the form, construction and arrangement of the parts without departing from the spirit and scope of my invention or sacrificing any of its material advantages, the forms hereinbefore described being merely the preferred embodiments thereof.

I claim:

1. A shrapnel fuse body comprising a diecast core, and a shell of malleable metal surrounding and closely fitting said core.

2. A shrapnel fuse body comprising a diecast core, and a drawn shell of malleable metal secured to the core in closely fitting relation therewith.

3. A shrapnel fuse body comprising a diecast core, and a drawn shell of malleable metal secured to the core in closely fitting relation therewith, said shell having a thread die-rolled therein adjacent its base.

4. A shrapnel fuse body comprising a diecast core and annular supplemental member, and a shell of malleable metal surrounding said core and supplemental member and maintaining them in assembled relation.

5. Ashrapnel fuse body comprising a diecast core and a malleable metal shell having a stiffening ring supporting it at-its greatest diameter, said shell being secured to said core and surrounding the major portion thereof.

6. The combination With a die-cast core and a surrounding shell of malleable metal of a die-cast cap secured to said core and a Wind shield of malleable metal secured to said cap.

7 A die-cast cap for shrapnel fuse bodies having a malleable Wind shield secured thereto.

8. A die-cast cap for shrapnel fuse bodies having a groove in its end and a stamped malleable Wind shield having a portion of its metal forced into said groove to fasten said wind shield securely to said cap.

9. A method of making fuse bodies comprising die-casting a core, forming a shell of malleable metal to snugly fit said core, and securing said core and shell together.

10. A method of making fuse bodies comprising die-casting a core, forming a shell of malleable metal to snugly fit said core, including die-rolling said shell to provide screw threads adjacent its base, and securing said core and shell together.

. IRVING L. POMEROY. lVitnesses WM. 0. BELT, M. A. Knmm.

Copies of this patent maybe obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. C. 

